The movie RENT covers many topics that could be considered controversial, including the concept of substance abuse and dependence. One of the main characters, Mimi, is a regular user of Heroin. Heroin, being a highly addictive narcotic, leads Mimi to experience Heroin withdrawal syndrome, showing symptoms like cramping, sweating, and chills. In the movie, Mimi starts out by occasionally using the drug, which shows how she just was abusing the drug, but due to the fact that Heroin is extremely addictive, the abuse soon turned to dependence. While watching it is very apparent that she craves the drug psychologically and physically, for she cannot stop herself from continuing to abuse the drug.
From 0:47 - 2:05 this clip shows bursts of how Mimi is so dependent on the drug that she is going through withdrawals. The way that the concept of drug abuse, dependence, and withdrawals is very accurate, due to the properties of Heroin. Heroin users can not go very long without the drug before they experience "heroin withdrawal syndrome", as described earlier. Usually, one can only go up to six hours without an additional dose before the negative symptoms start. Due to the fact that at this point in the plot Mimi is trying to get away from the drug all together, her symptoms are very extreme.
Even though the concepts are portrayed very well, I would not necessarily recommend watching the movie for this purpose, or just to see the effects of the heroin, because it is a subplot and does not focus on the drug abuse very much. In the movie, you can see that Mimi is not in a good state. You can tell she is in pain by the way she is shaking and is sweating and is bent over in agony. Although this may seem extreme to those who don't know about the drug, this is accurate to what withdrawal may be like for those dependent on heroin.